Brake for talking-machine motors.



PATBNTED OCT. 13, 1903.

E. R. JOHNSON.- BRAKE FOR TALKING MACHINE MOTORS.

APPLICATION FILED MAY 13, 1902.

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UNITED; STATES Patented October 13, 190$.

* PATENT OFFICE.

ELDRIDGE R. JOHNSON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO VICTOR TALKING MACHINE COMPANY, A CORPORATION OF NEW JERSEY.

BRAKE FOR TALKING-MACHINE MOTORS.

SPECIFICATION forming part of Letters Patent No. 741,501, dated October 13, 1903. Application filed May 13, 1902. Serial No. 107,128. (No model.)

To all whom it may concern.-

Be it knownthat I, ELDRIDGE R. JOHNSON, a citizen of the United States, and a resident of the city of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvem outs in Brakes for Talking-Machine Motors, of which the following is a full, clear,

and exact description, reference being had to 'untrueness which may exist in the said table or support, and, further,in providing an improved mechanism for. actuating the said brake and effectively stopping the revolu tions of the record-support.

With these objects in view my invention consists in the construction and arrangement, such as hereinafter fully described, and particularly pointed out in the claims made hereto.

Referring to the accompanying drawings, Figure 1 is a plan view illnstratinga portion of a talking-machine showing my improved brake applied thereto. Fig. 2 is a side elevation, the brake-bolt being shown as out'of contact with the record -supporting table. Fig. 3 is a sectional elevation, the brake-bolt being shown as bearing against the recordsupporting table. view showing the cam-lever for actuating the brake-bolt in the position it assumes when said bolt is in contact with the supportingtable, the dotted lines showing the position of the cam-lever when said bolt is withdrawn from the supporting-table.

Referring particularly to the said drawings,

' 1 designates the casing, which incloses the motor mechanism of the ordinary type of disk talking-machine, and 2 is a turn-table, which bore.

Fig. 1 is a bottom plan.

is mounted in the usual manner on the driving-spindle-of the motor.

The brake comprises a hollow tubular sleeve, as 3, made of any suitable material, having projecting ears 15 on each side thereof, by means of which it is secured to casing of the machine. The inner boreof the sleeve3 is slightly reduced in diameter at a point near its outer end, as illustrated in Fig. 3, and extending on the lower side of the sleeve is a longitudinal slot 1, which enters into the said A brake-bolt 5, having a reduced portion 6, is adapted to the interior of the sleeve 3 and is provided with a pin 7, located adjacent its outer end, which extends through the longitudinal slot 4 and projects a short distance below the outer sn rface of the sleeve. A coiled spring 8 surrounds the reduced portion of the bolt, hearing at one end against the shoulder formed by the larger portion 5 and at its other end against a shoulder formed by the reduced diameter of the sleeve-bore.

The under side of the sleeve between the two ears 15 is recessed, as at 9, to provide a bearing for the cam-lever 10,which is pivoted, through the medium of the pin 11, to the said sleeve 3. This cam-lever is provided on one edge with a recess 12 and the cam-surface 13 on one side of said recess, which bears against the pin 7, carried by the brake-bolt 6. On the end of the cam-lever 10 is an upwardlyextending projection 14, which serves as a thumb-piece or handle for operating the'camlever.

When the brake-bolt is withdrawn from contact with the turn-table, the cam-1ever assumes the position shown in Fig. 1 and in dotted lines in Fig. 4, and the pin 7 is held in the recess 12 of said lever, which holds the bolt out of contact and causes the spring 8 to be compressed within the bore of the sleeve 3. As soon as the lever 10 is moved to one against the pin 7, operates to push the said pin outwardly, and thereby withdraw the said bolt from contact with the turn-table and at the same time compress the spring within the bore of the sleeve 3, and when the said lever has been moved until the pin 7 rests in the recess 12 the said lever Will be held in this position by the pressure of the spring exerted on the same through the medium of the pin 7.

While I have shown and described myimproved brake as being applied to the periphery of a record-supporting table in talkingmachines, it is evident that the same might be applied to the under side of the table without changing the principle of my invention. Such a construction would, however, necessitate the securing of the brake in a vertical position instead of a horizontal, which could be easily accomplished.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a brake for talking-machines, the combination with a turn-table, a casing, a plunger substantially inclosed by said casing, a coiled spring carried by said plunger and adapted to force the same against the turntable, a projection carried by said plunger, and a notched lever pivoted to said casing, the notch forming a cam adapted to contact with said projection to withdraw said plunger.

2. A brake for talking-machines, comprising in combination with the turn-table, a tubular casing, a plunger, a coiled spring surrounding said plunger and adapted to force the same against the turn-table, a pin carried by said plunger, and a notched lever pivoted to said casing, the notch forming a cam adapted to contact with said pin to withdraw said plunger.

3. A brake for talking-machines comprising in combination with the turn -table a tubular casing, a plunger having a reduced portion within said casing, a coiled spring surroundingsaidreduced portion and adapted to force said plunger against the turn-table, a pin carried by said plunger adapted to reciprocate in a slot in said casing and a substantially straight notched lever pivoted to said casing, the notch forming a cam adapted to contact with said pin to withdraw said plunger.

In witness whereof I have hereunto set my hand this 8th day of April, A. D. 1902.

ELDRIDGE R. JOHNSON.

\Vitnesses:

ALBERT O. MIDDLETON, JNo. T. CRoss. 

